Telegraph-instrument



(No Model.)

0. A. DIGKINSON. TBLEGRAPH INSTRUMENT.

Patentdoct. 29, 1895.

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lllllllllllllllnnm"n WITNESSES:

M. PHUTD-LITHQWASHINGTON D C UNITED STATES PATENT EEICEe ORVILLE A.h DICKINSON, OF ARVERNE, NEW YORK.

TELEGRAPH-INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 548,969, dated October 29, 1895.

Application fled J'uly 13, 1895. Serial No. 555,935. (No model.)

.To a/ZZ whom t may concern,.-

Be it known that I, ORvILLE A. Dickinson, a citizen of the United States, and a resident of Arverne, in the county of Queens and State of NewYork, have invented certain new and useful Improvements in Telegraph- Instruments, of which the following is aspecification.

The present invention relates to new and useful improvements in telegraph instruments; and it consists in a new and improved trunnion for keys, Sounders, relays, doc., and by its use I not only prevent the lever Working loose or to one side, and thereby causing poor or unequal contact, but I gain a more fieXi ble leverage and more perfect control with the trunnion illustrated in the accompanying drawings than it is possible to obtain with any of the trunnions now in use.

Referring to said drawings, which are made a part of these specifications, Figure l gives a side view of the key complete. Fig. 2 gives a top view of the key-lever, trunnion, trunnionposts, and base. Fig. 3 gives a top view of an armature, armature-lever, trunnion, trunnion-posts, and electromagnet.

Again referring to the different figures in the drawings, in Fig. l leverv L is shown as pinioned at one end of base B, and the weight of the lever taken by spring S, which in turn is controlled by adjustable screw s. By this means, combined with the peculiar shape of the lever, I obtain a longer and more liexible leverage than it is possible to obtain with most of the numerous keys now in use.

Fig. 2 shows more fully the peculiar shape of lever L and how it is connected to base B. The posts P P are the trunnion-posts and are fastened to the base B. The yoke end'Y of lever L is fastened to the trunnion screwpoints T T', which in turn tit into pests P P'. Said trunnion-points T T' are controlled by the adjustable nut N, which has a right and left hand screwthread, so that by adjusting said nut N lever L is always kept in a central position. The contact-points are compelled to strike square on top of each other and thereby make perfect connection. Lock-nuts nu are for the purpose of locking adjustable nut N to trunnion-points T T', and thereby prevent the lever L from Working loose. It is at times desirable to obtain astiffer leverage than it is possible to obtain by the spring alone. I accomplish this result by tightening nut N, so that trunnion-points T T' are tightly wedged into trunnion-posts P P', in which case the peculiar yoke shape of lever L gives the necessary amount of elasticity to make a perfect working key. j

Fig. 3 shows the necessary combination of the adjustable 'trunnion and lever with an armature in order to allow them to be controlled by an electromagnet.

Now, having described the different parts and their relation to each other, what I claim as new, and desire to secure by Letters Patent, is-

In a telegraph instrument, the combination of trunnion-points T. T. adjustable nut N. and lock-nuts n. n. with lever L. and trunnion-posts P. P all substantially as set forth.

Signed at Arverne, in the county of Queens and State of New York, thisa 2d day of July, A. D. 1895. v

ORVILLE A. DICKINSON.

Witnesses:

WM. H. RETNHART, WM. SCHONCKE. 

